<script setup lang="ts">
  import { computed, ref } from 'vue'
  // 导入组件
  import XtxGuess from '@/components/XtxGuess'
  // 调用封装好的组合式函数
  import { useXtxGuessFunction } from '@/composables/index'
  // 使用封装的组合式函数
  const { guessRef, onScrollToLower } = useXtxGuessFunction()
  //导入持久化数据库
  import { useMemberStore } from '@/stores/index'
  const memberStore = useMemberStore()
  // 导入API接口
  import { getCartAPI, delCartAPI, changeCartNumberAPI, changeCartSelectAPI } from '@/services/cart'
  import { onShow } from '@dcloudio/uni-app'
  // 导入声明文件
  import type { CartItem } from '@/types/cart'
  import type { InputNumberBoxEvent } from '@/components/vk-data-input-number-box/vk-data-input-number-box'


  // 获取购物车数据
  const cartListData = ref<CartItem[]>([])
  const getCartListData = async () => {
    const { result } = await getCartAPI()
    cartListData.value = result
  }

  // 页面显示调用
  onShow(async () => {
    await getCartListData()
  })

  // 页面删除功能
  const onDelCart = (goodsID : string) => {
    uni.showModal({
      content: '确认删除吗',
      success: async (res) => {
        if (res.confirm) {
          await delCartAPI({ ids: [goodsID] })
          getCartListData()
        }
      }
    })
  }

  // 商品数量
  const numberOnChange = async (ev : InputNumberBoxEvent) => {
    await changeCartNumberAPI(ev.index, { count: ev.value })
  }

  // 商品选中状态
  const cartOnChangeSelect = async (item : CartItem) => {
    // 前端修改
    item.selected = !item.selected
    // 后端修改
    await changeCartNumberAPI(item.skuId, { selected: item.selected })
  }

  // 计算属性判断是否全选
  const isAllCartSelect = computed(() => {
    return cartListData.value.length && cartListData.value.every(item => item.selected === true)
  })

  // 点击是否全选
  const onAllCartSelect = async () => {
    const _isAllCartSelect = !isAllCartSelect.value
    // 前端修改
    cartListData.value.forEach(item => item.selected = _isAllCartSelect)
    // 后端修改
    await changeCartSelectAPI({ selected: _isAllCartSelect })
  }

  // 商品选中的数据
  const cartSelectCount = computed(() => {
    return cartListData.value.filter(item => item.selected);
  })

  // 计算商品选中数量
  const cartAllSelectCount = computed(() => {
    return cartSelectCount.value.reduce((sum, item) => sum + item.count, 0)
  })

  // 计算选中商品的价格
  const cartAllSelecctPrice = computed(() => {
    return cartSelectCount.value.reduce((sum, item) => sum + item.count * item.price, 0).toFixed(2)
  })

  // 结算
  const goPayPages = () => {
    if (cartAllSelectCount.value === 0) {
      return uni.showToast({
        icon: "none",
        title: "请选择商品"
      })
    }
    else {
      uni.navigateTo({
        url: "/pagesOrder/create/create"
      })
    }
  }
</script>

<template>
  <scroll-view scroll-y class="scroll-view" @scrolltolower="onScrollToLower">
    <!-- 已登录: 显示购物车 -->
    <template v-if="memberStore.profile">
      <!-- 购物车列表 -->
      <view class="cart-list" v-if="cartListData.length">
        <!-- 优惠提示 -->
        <view class="tips">
          <text class="label">满减</text>
          <text class="desc">满1件, 即可享受9折优惠</text>
        </view>
        <!-- 滑动操作分区 -->
        <uni-swipe-action>
          <!-- 滑动操作项 -->
          <uni-swipe-action-item v-for="item in cartListData" :key="item.skuId" class="cart-swipe">
            <!-- 商品信息 -->
            <view class="goods">
              <!-- 选中状态 -->
              <text class="checkbox" @tap=cartOnChangeSelect(item) :class="{ checked: item.selected }"></text>
              <navigator :url="`/pages/goods/goods?id=${item.id}`" hover-class="none" class="navigator">
                <image mode="aspectFill" class="picture" :src="item.picture"></image>
                <view class="meta">
                  <view class="name ellipsis">{{item.name}}</view>
                  <view class="attrsText ellipsis">{{item.attrsText}}</view>
                  <view class="price">{{item.nowPrice}}</view>
                </view>
              </navigator>
              <!-- 商品数量 -->
              <view class="count">
                <!--                <text class="text">-</text>
                <input class="input" type="number" :value="item.count.toString()" />
                <text class="text">+</text> -->
                <vk-data-input-number-box v-model="item.count" :min="1" :max="item.stock" :index="item.skuId"
                  @change="numberOnChange"></vk-data-input-number-box>
              </view>
            </view>
            <!-- 右侧删除按钮 -->
            <template #right>
              <view class="cart-swipe-right">
                <button class="button delete-button" @tap="onDelCart(item.skuId)">删除</button>
              </view>
            </template>
          </uni-swipe-action-item>
        </uni-swipe-action>
      </view>
      <!-- 购物车空状态 -->
      <view class="cart-blank" v-else>
        <image src="/static/images/blank_cart.png" class="image" />
        <text class="text">购物车还是空的，快来挑选好货吧</text>
        <navigator open-type="switchTab" url="/pages/index/index" hover-class="none">
          <button class="button">去首页看看</button>
        </navigator>
      </view>
      <!-- 吸底工具栏 -->
      <view class="toolbar">
        <text class="all" @tap="onAllCartSelect" :class="{ checked: isAllCartSelect }">全选</text>
        <text class="text">合计:</text>
        <text class="amount">{{cartAllSelecctPrice}}</text>
        <view class="button-grounp" @tap="goPayPages">
          <view class="button payment-button" :class="{ disabled: cartAllSelectCount===0 }"> 去结算({{cartAllSelectCount}})
          </view>
        </view>
      </view>
    </template>
    <!-- 未登录: 提示登录 -->
    <view class="login-blank" v-else>
      <text class="text">登录后可查看购物车中的商品</text>
      <navigator url="/pages/login/login" hover-class="none">
        <button class="button">去登录</button>
      </navigator>
    </view>
    <!-- 猜你喜欢 -->
    <XtxGuess ref="guessRef"></XtxGuess>
    <!-- 底部占位空盒子 -->
    <view class="toolbar-height"></view>
  </scroll-view>
</template>

<style lang="scss">
  // 根元素
  :host {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: #f7f7f8;
  }

  // 滚动容器
  .scroll-view {
    flex: 1;
  }

  // 购物车列表
  .cart-list {
    padding: 0 20rpx;

    // 优惠提示
    .tips {
      display: flex;
      align-items: center;
      line-height: 1;
      margin: 30rpx 10rpx;
      font-size: 26rpx;
      color: #666;

      .label {
        color: #fff;
        padding: 7rpx 15rpx 5rpx;
        border-radius: 4rpx;
        font-size: 24rpx;
        background-color: #27ba9b;
        margin-right: 10rpx;
      }
    }

    // 购物车商品
    .goods {
      display: flex;
      padding: 20rpx 20rpx 20rpx 80rpx;
      border-radius: 10rpx;
      background-color: #fff;
      position: relative;

      .navigator {
        display: flex;
      }

      .checkbox {
        position: absolute;
        top: 0;
        left: 0;

        display: flex;
        align-items: center;
        justify-content: center;
        width: 80rpx;
        height: 100%;

        &::before {
          content: '\e6cd';
          font-family: 'erabbit' !important;
          font-size: 40rpx;
          color: #444;
        }

        &.checked::before {
          content: '\e6cc';
          color: #27ba9b;
        }
      }

      .picture {
        width: 170rpx;
        height: 170rpx;
      }

      .meta {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        margin-left: 20rpx;
      }

      .name {
        height: 72rpx;
        font-size: 26rpx;
        color: #444;
      }

      .attrsText {
        line-height: 1.8;
        padding: 0 15rpx;
        font-size: 24rpx;
        align-self: flex-start;
        border-radius: 4rpx;
        color: #888;
        background-color: #f7f7f8;
      }

      .price {
        line-height: 1;
        font-size: 26rpx;
        color: #444;
        margin-bottom: 2rpx;
        color: #cf4444;

        &::before {
          content: '￥';
          font-size: 80%;
        }
      }

      // 商品数量
      .count {
        position: absolute;
        bottom: 20rpx;
        right: 5rpx;

        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 220rpx;
        height: 48rpx;

        .text {
          height: 100%;
          padding: 0 20rpx;
          font-size: 32rpx;
          color: #444;
        }

        .input {
          height: 100%;
          text-align: center;
          border-radius: 4rpx;
          font-size: 24rpx;
          color: #444;
          background-color: #f6f6f6;
        }
      }
    }

    .cart-swipe {
      display: block;
      margin: 20rpx 0;
    }

    .cart-swipe-right {
      display: flex;
      height: 100%;

      .button {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 50px;
        padding: 6px;
        line-height: 1.5;
        color: #fff;
        font-size: 26rpx;
        border-radius: 0;
      }

      .delete-button {
        background-color: #cf4444;
      }
    }
  }

  // 空状态
  .cart-blank,
  .login-blank {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    height: 60vh;

    .image {
      width: 400rpx;
      height: 281rpx;
    }

    .text {
      color: #444;
      font-size: 26rpx;
      margin: 20rpx 0;
    }

    .button {
      width: 240rpx !important;
      height: 60rpx;
      line-height: 60rpx;
      margin-top: 20rpx;
      font-size: 26rpx;
      border-radius: 60rpx;
      color: #fff;
      background-color: #27ba9b;
    }
  }

  // 吸底工具栏
  .toolbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: var(--window-bottom);
    z-index: 1;

    height: 100rpx;
    padding: 0 20rpx;
    display: flex;
    align-items: center;
    border-top: 1rpx solid #ededed;
    border-bottom: 1rpx solid #ededed;
    background-color: #fff;
    box-sizing: content-box;

    .all {
      margin-left: 25rpx;
      font-size: 14px;
      color: #444;
      display: flex;
      align-items: center;
    }

    .all::before {
      font-family: 'erabbit' !important;
      content: '\e6cd';
      font-size: 40rpx;
      margin-right: 8rpx;
    }

    .checked::before {
      content: '\e6cc';
      color: #27ba9b;
    }

    .text {
      margin-right: 8rpx;
      margin-left: 32rpx;
      color: #444;
      font-size: 14px;
    }

    .amount {
      font-size: 20px;
      color: #cf4444;

      .decimal {
        font-size: 12px;
      }

      &::before {
        content: '￥';
        font-size: 12px;
      }
    }

    .button-grounp {
      margin-left: auto;
      display: flex;
      justify-content: space-between;
      text-align: center;
      line-height: 72rpx;
      font-size: 13px;
      color: #fff;

      .button {
        width: 240rpx;
        margin: 0 10rpx;
        border-radius: 72rpx;
      }

      .payment-button {
        background-color: #27ba9b;

        &.disabled {
          opacity: 0.6;
        }
      }
    }
  }

  // 底部占位空盒子
  .toolbar-height {
    height: 100rpx;
  }
</style>
